A low-FODMAP diet was one of the things that I credit to helping me recover from 20+ years of undiagnosed, unmanaged celiac disease, including the IBS and small intestinal bacterial overgrowth (SIBO) that I developed as a consequence.
I eventually transitioned to a similar protocol called the Specific Carbohydrate Diet, which has some amount of controversy around it (and the closely-related GAPS diet), but ultimately was the right thing for me at that time.
If you have GI issues and see a gastroenterologist, you might have access to a nutritionist who is affiliated with their practice. If you have that option, take it. I never would have come across any of this on my own, and the gastroenterologist himself was not well-versed in the details of elimination diets, food sensitivities, or anything else "sub-clinical" along those lines.
I eventually transitioned to a similar protocol called the Specific Carbohydrate Diet, which has some amount of controversy around it (and the closely-related GAPS diet), but ultimately was the right thing for me at that time.
If you have GI issues and see a gastroenterologist, you might have access to a nutritionist who is affiliated with their practice. If you have that option, take it. I never would have come across any of this on my own, and the gastroenterologist himself was not well-versed in the details of elimination diets, food sensitivities, or anything else "sub-clinical" along those lines.